Where did he say that? The Lee devices that were described prior to your post qualify as "auto powder dispensers" unless you have an ingrained prejudice against inexpensive solutions.
Right or wrong, I also interpreted his question to mean automated dispensers like the RCBS Chargemaster. The original poster also referred to "calibrating" the dispenser, which I interpret to be different than setting a powder thrower like a Uniflow.
If he is referring to the automated dispensers, there is a very thorough writeup over on the 6mmbr site. Based on that review I purchased a Chargemaster several years ago, and have been happy with it for some chores, but not all.
Where the Chargemaster works well for me is when loading up very small batches of incremental charge weights. In other words, 5 rounds with 49.0 grains, 5 rounds with 50.0 grains, etc. Much faster than setting a thrower like a Uniflow. For larger batches, I can throw/weigh/trickle just about as fast. With handgun cartridges, a thrower is more than accurate enough, and much faster, so I don't use the Chargemaster for those.
As far as accuracy in charge weights, the Chargemaster is pretty good, but can have a little trouble with extruded powders like IMR 4895. As the dispenser tube turns, a little "wave" of kernels builds up in the tube and keeps individual kernels from falling into the pan, until suddenly a bunch fall at the same time, and you end up 0.1 or 0.2 grains over. There are some ideas out there to fix this, including putting a piece of soda straw over the end of the tube, but I haven't tried it yet.
The newer Chargemasters have a nice feature that I wish I had on mine - after you set the pan back on the scale and the scale has settled on zero, it automatically dispenses another charge. With mine, you have to wait for the scale to zero, then push a button. The scale takes only a second or two to zero, but it is still annoying.
Hope this helps.
Those are some accurate loads you're making there!!
